将测试失败的测试添加到go项目的最快方法？

I want to add tests to a Go project and have them fail when I run go test ./....

This is only for testing purposes. What is the minimum I need to add to my project to get failing tests?

Add this to a *_test.go file, ie. fail_test.go:

func TestWillFail(t *testing.T) {
    t.Errorf("This test will fail.")
}